Since no dumps available, you can try and create some by running the driver verifier, which will stress-test your non-MS drivers. If the verifier flags a driver, it will BSOD the system. To re-start, it may be necessary to run Windows external image icon1.png or Vista System Repair. If this were my system and I had the chance to have it looked over - I would do it. No guarantees of course. But one never knows what another set of eyes can see.

To run the driver verifier - bring up an elevated administrative cmd/DOS prompt:
START | type cmd.exe | right-click on cmd.exe uptop under programs | Run as external image icon1.png | type verifier & hit enter - the Verifier screen will appear | do the following:
<span style="background-color: #fcfcfc; font-size: 11px;"><span class="lit" style="color: #006666;">1.</span><span class="typ" style="color: #660066;">Select</span><span class="lit" style="color: #006666;">2nd</span><span class="pln"> option </span><span class="pun" style="color: #666600;">-</span><span class="typ" style="color: #660066;">Create</span><span class="pln"> custom settings </span><span class="pun" style="color: #666600;">(</span><span class="kwd" style="color: #000088;">for</span><span class="pln"> code developers</span><span class="pun" style="color: #666600;">)</span><span class="lit" style="color: #006666;">2.</span><span class="typ" style="color: #660066;">Select</span><span class="lit" style="color: #006666;">2nd</span><span class="pln"> option </span><span class="pun" style="color: #666600;">-</span><span class="typ" style="color: #660066;">Select</span><span class="pln"> individual settings </span><span class="kwd" style="color: #000088;">from</span><span class="pln"> a full list</span><span class="pun" style="color: #666600;">.</span><span class="lit" style="color: #006666;">3.</span><span class="typ" style="color: #660066;">Check</span><span class="pln"> the boxes
    </span><span class="pun" style="color: #666600;">•</span><span class="typ" style="color: #660066;">SpecialPool</span><span class="pun" style="color: #666600;">•</span><span class="typ" style="color: #660066;">PoolTracking</span><span class="pun" style="color: #666600;">•</span><span class="typ" style="color: #660066;">Force</span><span class="pln"> IRQL checking
</span><span class="lit" style="color: #006666;">4.</span><span class="typ" style="color: #660066;">Select</span><span class="kwd" style="color: #000088;">last</span><span class="pln"> option </span><span class="pun" style="color: #666600;">-</span><span class="typ" style="color: #660066;">Select</span><span class="pln"> driver names </span><span class="kwd" style="color: #000088;">from</span><span class="pln"> a list
</span><span class="lit" style="color: #006666;">5.</span><span class="typ" style="color: #660066;">Click</span><span class="pln"> on the </span><span class="typ" style="color: #660066;">Provider</span><span class="pln"> heading </span><span class="pun" style="color: #666600;">-</span><span class="pln"> sorts list </span><span class="kwd" style="color: #000088;">by</span><span class="typ" style="color: #660066;">Provider</span><span class="lit" style="color: #006666;">6.</span><span class="typ" style="color: #660066;">Check</span><span class="pln"> ALL boxes </span><span class="kwd" style="color: #000088;">where</span><span style="color: #005dbd; text-decoration: none;">[[http://www.microsoftstore.com/|Microsoft]]</span><span class="kwd" style="color: #000088;">isnot</span><span class="pln"> the </span><span class="typ" style="color: #660066;">Provider</span><span class="lit" style="color: #006666;">7.</span><span class="typ" style="color: #660066;">Click</span><span class="pln"> on </span><span class="typ" style="color: #660066;">Finish</span><span class="lit" style="color: #006666;">8.</span><span class="typ" style="color: #660066;">Re</span><span class="pun" style="color: #666600;">-</span><span class="pln">boot</span>
 
<span style="background-color: #ffffff; color: #32454e; font-family: 'Open Sans',tahoma,helvetica,arial,sans-serif; font-size: 14px;">Again... if the Driver Verifier (DV) finds a violation (flags a driver), it will result in a BSOD. To see the status of the D/Verifier, bring up an elevated cmd/DOS prompt and type </span>**<span style="background-color: #ffffff; color: #32454e; font-family: 'Open Sans',tahoma,helvetica,arial,sans-serif; font-size: 14px;">verifier</span>**<span style="background-color: #ffffff; color: #32454e; font-family: 'Open Sans',tahoma,helvetica,arial,sans-serif; font-size: 14px;"> - select the last option on the first screen - "Display information about the currently verified drivers..". If your system becomes too unstable (the d/v utilizes CPU & RAM), turn d/v off - type </span>**<span style="background-color: #ffffff; color: #32454e; font-family: 'Open Sans',tahoma,helvetica,arial,sans-serif; font-size: 14px;">verifier /reset</span>**<span style="background-color: #ffffff; color: #32454e; font-family: 'Open Sans',tahoma,helvetica,arial,sans-serif; font-size: 14px;"> then re-boot.
 
If you get a verifier-enabled BSOD, get the mini dump - go to \windows\minidump - copy it out, zip it up and attach. </span></span>